Permutations and Combinations

Question

Assuming the balls to be identical except for difference in colours, the number of ways in which one or more balls can be selected from 10 white, 9 green and 7 black balls is:

Accepted Answer

Option D. For alike n objects, number of ways we can select zero or more objects = n + 1 and number of ways we can select at least one object = n

More on Permutations and Combinations

Permutations and Combinations

More on Permutations and Combinations